insert into DEPARTMENT
select
    'B300',
    '2023-04-01',
    NULL,
    '新設部門',
    LAYER,
    UP_DEPT_CODE,
    '1',
    UPDATE_USER_NAME,
    '2023-04-01 00:00:00'
from DEPARTMENT
where DEPT_CODE = 'A100'
;

update DEPARTMENT
set 
    END_DATE = '2023-03-31',
    VALID_FLG = '0',
    UPDATE_USER_NAME = 'ORG_CHG',
    USER_UPDATE_DATETIME = '2023-03-31 23:59:59'
where DEPT_CODE in ('A100', 'A200')
;

update EMP
    set DEPT_CODE = 'B300'
where DEPT_CODE in ('A100', 'A200')
and VALID_FLG = '1'